/* 字体声明 */
@font-face {
    font-family: 'icomoon';
    src: url('fonts/icomoon.eot?dao32a');
    src: url('fonts/icomoon.eot?dao32a#iefix') format('embedded-opentype'),
        url('../fonts/icomoon.ttf?dao32a') format('truetype'),
        url('fonts/icomoon.woff?dao32a') format('woff'),
        url('fonts/icomoon.svg?dao32a#icomoon') format('svg');
    font-weight: normal;
    font-style: normal;
    font-display: block;
}

* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;

}

ul {
    list-style: none;
}

.book-system {
    margin: 0 auto;
    width: 2000px;
    height: 1000px;
    background-color: #0a1526;
    border: 2px solid #eef2f8;
}

/* 左边 */
.left {
    float: left;
    width: 350px;
    height: 1000px;
}

.left header {
    width: 330px;
    height: 70px;
    padding-top: 30px;
    padding-left: 23px;
    color: white;
}

h1 {
    font-weight: 400;
}

.left .nav li a {
    position: relative;
    display: block;
    width: 260px;
    height: 65px;
    margin-left: 90px;
    line-height: 70px;
    font-size: 26px;
    color: white;
}

.left .nav .center::after,
.left .nav .item .system::after {
    content: '\ea50';
    font-family: 'icomoon';
    font-size: 35px;
    position: absolute;
    top: -8px;
    right: 15px;
    transform: rotate(180deg);
}

.left .nav .center::before {
    content: '\e900';
    font-family: 'icomoon';
    font-size: 35px;
    position: absolute;
    top: 0px;
    left: -65px;
}

.left .nav .item .system::before {
    content: '\ea3e';
    font-family: 'icomoon';
    font-size: 35px;
    position: absolute;
    top: 0px;
    left: -65px;
}

.left .nav .item ul a {
    font-size: 24px;
}
.left .nav .item ul .active {
    background-color: #fff;
    color: black;
}
.left .nav .item li a::before {
    content: '\ea0b';
    font-family: 'icomoon';
    font-size: 18px;
    position: absolute;
    top: 0px;
    left: -44px;
}

/* 右边 */
.right {
    float: right;
    width: 1650px;
    height: 1000px;
    background-color: #eef2f8;
}

.right footer {
    width: 1650px;
    height: 100px;
    line-height: 100px;
    background-color: #ffffff;
}
.right footer span{
    font-size: 18px;
}
.right footer .welcome{
    float: left;
    
    font-size: 22px;
    margin-left: 30px;
    margin-right: 30px;
    /* color: skyblue; */
}
.right footer .welcome h1{
    font-weight: 600;
}
.right footer .img {
    float: right;
    margin-right: 60px;
}

.right footer .img img {
    vertical-align: middle;
    height: 80px;
    border-radius: 50%;
}

.right footer .img span {
    font-size: 20px;
    position: relative;
}

.right footer .img span::after {
    content: '\ea50';
    font-family: 'icomoon';
    position: absolute;
    font-size: 24px;
    left: 100px;
    transform: rotate(180deg);
}

/*  */
.right .content {
    width: 1550px;
    height: 860px;
    margin: 0 auto;
    margin-top: 30px;
    background-color: #ffffff;
}

